This triangular body of water is called a delta. It is shaped like the Greek letter delta and was coined by Herodotus, the father of history who lived from 484 to 425 BC by seeing the deltoid shape at the mouth of the Nile.
Deltas occur throughout the world except at the poles. They all have three things in common, namely:
1. The presence of a large catchment basin. The top 30 river deltas all have catchment basins.
2. They all are at the mouth of large river systems that carry large quantities of clastic sediments (soils or portions of rocks that have been moved by water from where they formed)
3. They are not found near geologically active coastlines. They take a long time to develop so they are very rarely situated on tectonically active coast.
B. limited the material in which natural selection can act upon.
C. increased genetic variation.
D. maintained the same gene combinations over time.
Answer:
Periodicity is best defined as:the repeating nature of physical and chemical properties with increasing atomic number.
Explanation:
The elements present in nature or discovered so far are arranged in the form of a table known as periodic table. This creation of table was started with previous scientists like
i) Dobereiner's law of triads: according to it the atomic mass of middle element is average of atomic mass of side elements.
ii) Newland's law of octave: the properties of elements are repeated after seven elements.
iii) Mendleev's periodic table: it was a regular arrangement of by then discovered elements based on their atomic mass.
Now
We have periodic table known as long form or modern periodic table. This table is based on atomic number. According to it , there is periodicity in the physical and chemical properties of elements if they are arranged in certain groups and periods based on their atomic number.
(2) charge and orientation
(3) energy and mass
(4) energy and orientation
An effective collision between reactant particles requires the particles to have the proper energy and orientation. The particles must have the minimum energy to collide with each other and proper orientation to overlap.
Collision is a short term force acting between two object when they hit together. According to the kinetic molecular theory of matter, only effective collisions leads to the chemical bonding between atoms.
To make effective collisions, the atoms or constituent particles must acquire a minimum amount of energy to overcome the barrier potential of reaction.
Similarly, the particles must have proper orientation to have overlapping between their valence shell and form chemical bonds. Inappropriate orientation does not leads to the formation of bond between particles. Hence, option 4 is correct.
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a nebula
a comment
a planet
Answer:
D. a planet
Explanation:
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Answer:
PCI5
Explanation: